Thickins



2 Sheets-Sheet 1. THICKINS -& SPERRY Farmers Boiler.

No. 113,222. Patented March 28,. 1871.

Mae/c Jnveniws %,W M QZM /7Z/ZAA/ 2 Sheets-Sheet 2L THICKINS & SPERRY.

Farmer's Boiler.

Patented March'28, 1871.

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RICHARD W. 'lHIiIKlNS AND DAVID ll. SPERRY, OF 'BATAVIA, ILLINOIS.

. Letters Patent No. 113,222, dated March 28 187 1.

IMPROVEMENT lN FARMERii' B0lLER3.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern:

Be it known that we, Brennan W. THIGKINS and DAVID R. serenity, of Batavia, in the county oi Kane and State of Illinois, have invented certain Improvements in Farmers Boilers; and we do hereby declarev that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing, which, together'with the letters and figures marked thereon, forms part of this specification, and in which- Figure 1. is a top or plan view of a farmefls boilercontaining our improvements."

. Figure 2 is a front elevation of same with the door of the fire-box removed.

Figure 3 is a vertical central section of fig. 2.

Figure a is a top or plan view of the lower part or fire-box, the upper part being removed.

Figure 5 is an enlarged detached sectional view of the safety-valve and low water indicator.

, Like'letters of reference made useof in the several figures indicate like parts.

' General Description. To enable those skilled in the art to make and use my invention 1 will proceed to describe the same with particularity, making reference in so doing to the {time said drawing.

1 .A is caldron or boiler, made withan opening or fine,

B, rising from the bottom or" the caldron and extending up to a level with theupper outside edge of said caldron. This flue is of a conical shape, being'larger at the bottom than at the top, and its purpose is to offer a larger heatingsurface to the action of th'e'furnace.

i To still further extend the heating surface a spirally-coiled pipe, 0, is placed within the conical fine, and connected with the caldrou at top and bottom, so that the water contained in the said caldron will rise to its level in the said coiled pipe, and the steam formed therein will pass out of the upper opening of the said pipe into the caldron.

Thejcaldron is supported upon trunnions in the usual way, to facilitate dumping to empty the contents, .and is surrounded by the usual hinged case or jacket D, which may be swung open to allow of the dumping. lhis case 1) is fitted with a horizontal partition, 11, which divides it for a part of the distance around the caldron-i-nto a double flue for the purpose cl causing the heat to perform a larger circuit, and more completely surround the boiler or caidron. ,The course of the heat from the furnace is indicated by the' arrows.

E is the chimney which carries off the products of combustior,'and

, 1 is a flue connecting the conical fine B with the said chimney.

The cover a of the caldron is made with a groove,

12, upon its under surface, extending entirely around the edge thereof, and also around the inner circumference.

These annular grooves contain round vulcanizedrubber piston-packing, t, which rests upon the edge of the caldron and forms steam-tight joints when said cover is bolted to the caldron. This method of .joining renders the labor of accurately fitting the joints wholly unnecessary.

' The joining of the caldron to the casing or jacket 1) is rendered tight by making a V-sbaped flange, 0, upon the under side of the lips or horizontal edge of the caldron which rests upon the similarly-beveled upper edge of the inclosiug-jacket D; the settling of the caldrcn by its weight tends to wedge the jacket outward, and efiectuallyrenders this joint close.

It is contemplated to provide the chimney E, and also the flue F, with dampers, so that the direction and quantity of the heat-current may be regulated, and made to pass either through the flue B orsimply around the caldrou, or by both exits, as may be deemed most expedient.

G is is the fire-box, uponwhich rests the superstructure of casing, caldron, 850., above described. This fire-box is intended for burning either wood or coal, at pleasure. I

The door H is made to open the full size of the front of the fire-box, upon hinges h h, and a flange, g, extends along the side and back of said fire-box for 'thcpurposc of supporting 'a basket-grate, J, which is employed when coal. instead of wood is burned.

This grate is made with flanges, j,at the sides and back, to rest onthe flanges g. Y

' The front plate of the grate extends in two wings, It, at the sides, above the flanges, so tl1at,'when the grate is pushed into place through'the doorway, which is made of full size for this purpose, the said wings extend out to the sides of the fire-box in front, so

that the fire-box is divided, by means of the wings and flanges, into two compartments, which have no inter-communication except through the grate.

This grate is made with bars -in frontat L, and at the back at M, and is provided at the'bottom with the usual pivoted dump N.

The basket-grate, it will thus be seen, is surrounded on all sidesrby an air-space, and a current of air is constantly flowing around the sides of the grate and A safety-valve, 0, is attached to the cover of the caldron.'

This valve is shown detached and enlarged, for the sake ofclearness, at fig. 5, andit consists of a vertical tube, P, provided with a bottom, 10, from which extends a flange or collar, upon which rests a rubber washer or packing, r. 1

This tube'passes through a hole in the cover a of the caldron, which opens into a chamber, 8, cast or constructed upon the under side of said cover.

A pipe, s extends downward from this chamber into the cald'ron' or boiler as far as low-water mark.

The bottom of the tube P is furnished with a pin or plug, 1,, having a conical flange, at, below, which said plug is encircled by a rubber packing, v. This plug projects down through a hole in the bottom of the chamber 8, but does not close said aperture, being fitted loosely therein.

A weighted lever, Q, is provided withan annula bearing, which encircles the tube 1? and rests on the packing 'r, and also on an outside packing, r, placed .around the outside of the aperture in the cover a of the caldron.

A second weighted lever, B, serves to hold the tube P up against the. lever Q.

This device serves as a safety-valve, a low-water indicator, and a faucet by which to withdraw water from the caldron; and operates a's'follows:

The steam in the caldron, when it attains a suificicnt pressure to over cure the weight of the lever Q,

lifts the pipe P and tie annular bearing of the lever Q out of the aperture in the cover a of the caldron, and the steam! escapes. I

When it is desired to test the quantity of water that is contained in the boiler the tube P is pressed down by raising the free end of the lever R until the" is pressed'down in the position described, and the water passes into said tube through these apertures,

and so out into any convenient desired receptacle. If

no water appears .that fact will indicate that the water in the boiler is below the lower extremity of the tube s-that is to say, below low-water mark.

O'Zai/ms. Having thus fully described the construction and operation oqur invention,

with annular grooves, with the round packing t, substantially as, and for the purpose specified.

4. The combination and arrangement of the caldron A, having a V-shaped flange, '0, with the -inclosing-jacket D, having a beveled edge," as described and shown and for the purpose specified.

5. The construction and arrangement of the basketgrate J, in connection with the fire-box G, whereby an air-space ismade to surround the'said grate, substantially in the manner specified, and for the purpose of preventing the loss of heatby radiation.

6. The conical basket-grate J, with bars at front and rear, in combination with the fire-box G, having the full-sized doorH and the flanges g, as and for the purpose specified.

7. The combined safety-valve, low-water indicator,

and hot-water faucet 0, consisting of the tube P, lev- I ers Q, R, chamber S, and tube S, when constructed and operating substantially as and for the purpose specified.

- R. W. THIOKINS. [L. s.] D. R. SPERRY. [L. 5.]

Witnesses:-

B. E. SPERRY, G20. 0. Nomnsm, 

